package net.jsoft.platform.core.util.ref;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

public class BeanRefUtil
{
    /**
     * 取Bean的属性和值对应关系的MAP
     * 
     * @param bean
     * @return Map
     */
    public static Map<String, String> getFieldValueMap(Object bean)
    {
        Class<?> cls = bean.getClass();
        Map<String, String> valueMap = new HashMap<String, String>();
        Method[] methods = cls.getDeclaredMethods();
        Field[] fields = cls.getDeclaredFields();
        for (Field field : fields)
        {
            try
            {
                String fieldType = field.getType().getSimpleName();
                String fieldGetName = parGetName(field.getName());
                if (!checkGetMet(methods, fieldGetName))
                {
                    continue;
                }
                Method fieldGetMet = cls.getMethod(fieldGetName, new Class[] {});
                Object fieldVal = fieldGetMet.invoke(bean, new Object[] {});
                String result = null;
                if ("Date".equals(fieldType))
                {
                    result = fmtDate((Date) fieldVal);
                } else
                {
                    if (null != fieldVal)
                    {
                        result = String.valueOf(fieldVal);
                    }
                }
                // String fieldKeyName = parKeyName(field.getName());
                valueMap.put(field.getName(), result);
            } catch (Exception e)
            {
                continue;
            }
        }
        return valueMap;
    }

    /**
     * set属性的值到Bean
     * 
     * @param bean
     * @param valMap
     */
    public static void setFieldValue(Object bean, Map<String, String> valMap)
    {
        Class<?> cls = bean.getClass();
        // 取出bean里的所有方法
        Method[] methods = cls.getDeclaredMethods();
        Field[] fields = cls.getDeclaredFields();

        for (Field field : fields)
        {
            try
            {
                String fieldSetName = parSetName(field.getName());
                if (!checkSetMet(methods, fieldSetName))
                {
                    continue;
                }
                Method fieldSetMet = cls.getMethod(fieldSetName, field.getType());
                // String fieldKeyName = parKeyName(field.getName());
                String fieldKeyName = field.getName();
                String value = valMap.get(fieldKeyName);
                if (null != value && !"".equals(value))
                {
                    String fieldType = field.getType().getSimpleName();
                    if ("String".equals(fieldType))
                    {
                        fieldSetMet.invoke(bean, value);
                    } else if ("Date".equals(fieldType))
                    {
                        Date temp = parseDate(value);
                        fieldSetMet.invoke(bean, temp);
                    } else if ("Integer".equals(fieldType) || "int".equals(fieldType))
                    {
                        Integer intval = Integer.parseInt(value);
                        fieldSetMet.invoke(bean, intval);
                    } else if ("Long".equalsIgnoreCase(fieldType))
                    {
                        Long temp = Long.parseLong(value);
                        fieldSetMet.invoke(bean, temp);
                    } else if ("Double".equalsIgnoreCase(fieldType))
                    {
                        Double temp = Double.parseDouble(value);
                        fieldSetMet.invoke(bean, temp);
                    } else if ("Boolean".equalsIgnoreCase(fieldType))
                    {
                        Boolean temp = Boolean.parseBoolean(value);
                        fieldSetMet.invoke(bean, temp);
                    } else
                    {
                        System.out.println("not supper type" + fieldType);
                    }
                }
            } catch (Exception e)
            {
                e.printStackTrace();
                continue;
            }
        }
    }

    /**
     * set属性的值到Bean
     * 
     * @param bean
     * @param valMap
     */
    public static void setFieldValue(Object bean, String name, Object value)
    {
        Class<?> cls = bean.getClass();
        // 取出bean里的所有方法
        Method[] methods = cls.getDeclaredMethods();
        Field[] fields = cls.getDeclaredFields();

        for (Field field : fields)
        {
            try
            {
                String fieldSetName = parSetName(field.getName());
                if (!checkSetMet(methods, fieldSetName))
                {
                    continue;
                }
                Method fieldSetMet = cls.getMethod(fieldSetName, field.getType());
                // String fieldKeyName = parKeyName(field.getName());
                String fieldKeyName = field.getName();
                if (!fieldKeyName.equals(name))
                {
                    continue;
                }
                fieldSetMet.invoke(bean, value);
                break;
            } catch (Exception e)
            {
                continue;
            }
        }
    }

    /**
     * 格式化string为Date
     * 
     * @param datestr
     * @return date
     */
    public static Date parseDate(String datestr)
    {
        if (null == datestr || "".equals(datestr))
        {
            return null;
        }
        try
        {
            String fmtstr = null;
            if (datestr.indexOf(':') > 0)
            {
                fmtstr = "yyyy-MM-dd HH:mm:ss";
            } else
            {
                fmtstr = "yyyy-MM-dd";
            }
            SimpleDateFormat sdf = new SimpleDateFormat(fmtstr, Locale.UK);
            return sdf.parse(datestr);
        } catch (Exception e)
        {
            return null;
        }
    }

    /**
     * 日期转化为String
     * 
     * @param date
     * @return date string
     */
    public static String fmtDate(Date date)
    {
        if (null == date)
        {
            return null;
        }
        try
        {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US);
            return sdf.format(date);
        } catch (Exception e)
        {
            return null;
        }
    }

    /**
     * 判断是否存在某属性的 set方法
     * 
     * @param methods
     * @param fieldSetMet
     * @return boolean
     */
    public static boolean checkSetMet(Method[] methods, String fieldSetMet)
    {
        for (Method met : methods)
        {
            if (fieldSetMet.equals(met.getName()))
            {
                return true;
            }
        }
        return false;
    }

    /**
     * 判断是否存在某属性的 get方法
     * 
     * @param methods
     * @param fieldGetMet
     * @return boolean
     */
    public static boolean checkGetMet(Method[] methods, String fieldGetMet)
    {
        for (Method met : methods)
        {
            if (fieldGetMet.equals(met.getName()))
            {
                return true;
            }
        }
        return false;
    }

    /**
     * 拼接某属性的 get方法
     * 
     * @param fieldName
     * @return String
     */
    public static String parGetName(String fieldName)
    {
        if (null == fieldName || "".equals(fieldName))
        {
            return null;
        }
        int startIndex = 0;
        if (fieldName.charAt(0) == '_')
            startIndex = 1;
        return "get" + fieldName.substring(startIndex, startIndex + 1).toUpperCase() + fieldName.substring(startIndex + 1);
    }

    /**
     * 拼接在某属性的 set方法
     * 
     * @param fieldName
     * @return String
     */
    public static String parSetName(String fieldName)
    {
        if (null == fieldName || "".equals(fieldName))
        {
            return null;
        }
        int startIndex = 0;
        if (fieldName.charAt(0) == '_')
            startIndex = 1;
        return "set" + fieldName.substring(startIndex, startIndex + 1).toUpperCase() + fieldName.substring(startIndex + 1);
    }

    /**
     * 获取存储的键名称（调用parGetName）
     * 
     * @param fieldName
     * @return 去掉开头的get
     */
    public static String parKeyName(String fieldName)
    {
        String fieldGetName = parGetName(fieldName);
        if (fieldGetName != null && "".equals(fieldGetName.trim()) && fieldGetName.length() > 3)
        {
            return fieldGetName.substring(3);
        }
        return fieldGetName;
    }

}
